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Track the adoption of Swift 6 strict concurrency checks for data race safety. How many packages are Ready for Swift 6?

Build Information

Successful build of SignalHandler, reference main (bb52b9), with Swift 6.1 for Linux on 28 Apr 2025 08:59:03 UTC.

Swift 6 data race errors: 0

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.1-latest swift build --triple x86_64-unknown-linux-gnu -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/Genaro-Chris/SignalHandler.git
Reference: main
Initialized empty Git repository in /host/spi-builder-workspace/.git/
hint: Using 'master' as the name for the initial branch. This default branch name
hint: is subject to change. To configure the initial branch name to use in all
hint: of your new repositories, which will suppress this warning, call:
hint:
hint: 	git config --global init.defaultBranch <name>
hint:
hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
hint: 'development'. The just-created branch can be renamed via this command:
hint:
hint: 	git branch -m <name>
From https://github.com/Genaro-Chris/SignalHandler
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at bb52b9c fix the signal handling bug
Cloned https://github.com/Genaro-Chris/SignalHandler.git
Revision (git rev-parse @):
bb52b9c5df6eba21adb6d540a19a2da6e6fab2fa
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/Genaro-Chris/SignalHandler.git at main
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/Genaro-Chris/SignalHandler.git
https://github.com/Genaro-Chris/SignalHandler.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "swift-docc-plugin",
      "requirement" : {
        "branch" : [
          "main"
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-docc-plugin"
    }
  ],
  "manifest_display_name" : "SignalHandler",
  "name" : "SignalHandler",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "Linux",
      "version" : "1.0.0"
    },
    {
      "name" : "macos",
      "version" : "10.15"
    }
  ],
  "products" : [
    {
      "name" : "SignalHandler",
      "targets" : [
        "SignalHandler"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SignalHandler",
      "module_type" : "SwiftTarget",
      "name" : "SignalHandler",
      "path" : "Sources/SignalHandler",
      "product_memberships" : [
        "SignalHandler"
      ],
      "sources" : [
        "SignalHandler.swift",
        "Signals.swift",
        "SourceSequence.swift",
        "extensions.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.8"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.1-latest swift build --triple x86_64-unknown-linux-gnu -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures 2>&1
basic-6.1-latest: Pulling from finestructure/spi-images
Digest: sha256:3bdcac04179f4ed3e5b8e9dbd6e74bbf5ebc0f4fde48bbaad7d1e5c757e65bcb
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.1-latest
Fetching https://github.com/apple/swift-docc-plugin
[1/2049] Fetching swift-docc-plugin
Fetched https://github.com/apple/swift-docc-plugin from cache (0.39s)
Fetching https://github.com/swiftlang/swift-docc-symbolkit
[1/3377] Fetching swift-docc-symbolkit
Fetched https://github.com/swiftlang/swift-docc-symbolkit from cache (0.40s)
Computing version for https://github.com/swiftlang/swift-docc-symbolkit
Computed https://github.com/swiftlang/swift-docc-symbolkit at 1.0.0 (1.01s)
Creating working copy for https://github.com/apple/swift-docc-plugin
Working copy of https://github.com/apple/swift-docc-plugin resolved at main (8357c77)
Creating working copy for https://github.com/swiftlang/swift-docc-symbolkit
Working copy of https://github.com/swiftlang/swift-docc-symbolkit resolved at 1.0.0
[1/1] Compiling plugin Swift-DocC Preview
[2/2] Compiling plugin Swift-DocC
Building for debugging...
[2/4] Write sources
[3/4] Write swift-version-24593BA9C3E375BF.txt
[5/9] Compiling SignalHandler SourceSequence.swift
/host/spi-builder-workspace/Sources/SignalHandler/SourceSequence.swift:29:22: warning: sending 'newValue' risks causing data races; this is an error in the Swift 6 language mode
27 |
28 |     fileprivate func appendToStream(newValue: Element) {
29 |         continuation.yield(newValue)
   |                      |- warning: sending 'newValue' risks causing data races; this is an error in the Swift 6 language mode
   |                      `- note: task-isolated 'newValue' is passed as a 'sending' parameter; Uses in callee may race with later task-isolated uses
30 |     }
31 | }
[6/9] Compiling SignalHandler SignalHandler.swift
/host/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:150:22: warning: sending 'completion' risks causing data races; this is an error in the Swift 6 language mode
148 |         with signals: [Signals], completion: @escaping ((Int32) async -> Void)
149 |     ) async {
150 |         let signal = SignalHandler(signals: signals, handler: completion)
    |                      |- warning: sending 'completion' risks causing data races; this is an error in the Swift 6 language mode
    |                      `- note: sending task-isolated 'completion' to actor-isolated initializer 'init(signals:handler:)' risks causing data races between actor-isolated and task-isolated uses
151 |         await signal.start()
152 |     }
/host/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:182:22: warning: sending 'handler' risks causing data races; this is an error in the Swift 6 language mode
180 |         with signals: Signals..., handler: @escaping ((Int32) async -> Void)
181 |     ) async {
182 |         let signal = SignalHandler(signals: signals, handler: handler)
    |                      |- warning: sending 'handler' risks causing data races; this is an error in the Swift 6 language mode
    |                      `- note: sending task-isolated 'handler' to actor-isolated initializer 'init(signals:handler:)' risks causing data races between actor-isolated and task-isolated uses
183 |         await signal.start()
184 |     }
[7/9] Compiling SignalHandler Signals.swift
[8/9] Emitting module SignalHandler
[9/9] Compiling SignalHandler extensions.swift
Build complete! (24.64s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "swift-docc-plugin",
      "requirement" : {
        "branch" : [
          "main"
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-docc-plugin"
    }
  ],
  "manifest_display_name" : "SignalHandler",
  "name" : "SignalHandler",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "Linux",
      "version" : "1.0.0"
    },
    {
      "name" : "macos",
      "version" : "10.15"
    }
  ],
  "products" : [
    {
      "name" : "SignalHandler",
      "targets" : [
        "SignalHandler"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SignalHandler",
      "module_type" : "SwiftTarget",
      "name" : "SignalHandler",
      "path" : "Sources/SignalHandler",
      "product_memberships" : [
        "SignalHandler"
      ],
      "sources" : [
        "SignalHandler.swift",
        "Signals.swift",
        "SourceSequence.swift",
        "extensions.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.8"
}
basic-6.1-latest: Pulling from finestructure/spi-images
Digest: sha256:3bdcac04179f4ed3e5b8e9dbd6e74bbf5ebc0f4fde48bbaad7d1e5c757e65bcb
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.1-latest
Done.